Does anyone know who the lifeblood bug is?

I’ve seen several images going around of a bug with a lifeblood butterfly over/in one of her eyes, but when I look on the internet for both Hollow Knight and silksong I can’t seem to find anything about her, not even an image. What’s her name? Where can I find her? Is she in Hollow Knight or Silksong? Please tell me anything you know because I’m so confused and curious